My son and I are building an n scale lay out with 7 switches. I think the problem has something to do with the way power is routed on the switch.
does bachmann may an n scale with a insulated frog? The only way to get an loco to go through a switch is if the siding goes through a dead end . The switches in the lumber yard and the passing track result in the loco causing a short.

Any and all suggestion would be appreciated.

Glenn